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I’m not convinced that they use just google results. I’m on page 1 for my KW’s in yahoo and page 2 on google and it has been that way for sometime now.
It's actually possible to move from page three to 1 as a result of these.
Strange. For the most part, Yahoo and Google results always seemed to mirror each other. Today, I did a search for one of my keywords and the Google results didn't start until #11. The top 10 were from somewhere else. Maybe Inktomi results?
Yahoo also appears to have filters for adjusting SERPs based on Yahoo directory entries.
To see an interesting and large difference between the two try searching for God. Many other very common keywords/phases show similar differences.
These differences are nothing to do with the update, they have been there for sometime.
Sorry Mattricks, but if you're searching Yahoo! from Pakistan or Jordan or Islamabad, your results may vary from someone searching from Ohio or Tunisia or Ireland. However, you're then at the mercy of contacting people that live in those areas to check the positions of the phrases you are searching for, or you can open up two browser windows and check the results that are relevant for you.
So to answer your question fully, yes, Yahoo uses Google search results, and yes, it is more complex than that.
What scares me is that I have found over 30 very, very common terms where Yahoo results differ significantly. By scares I mean Yahoo is much better in almost all of cases (unbiased opinion, no searches were in my cats).
The God example is an extreme case of someone wanting to prove they can rank high using backlinks/anchor text only. True proof that site content doesn't always matter!
But the other sites aren't playing these tricks, it is caused by the algo differences.
The only difference I noticed before dominic is that yahoo eliminated double listings of URLs and -ex is doing just that now.
results of yahoo only were always shown as separate on top.
but if they hand edit the search for god there are bound to be more examples like that.